Miss Church,
My 53 235 is out of a car that originally came with a powerglide transmission. It is the first full oil pressure engine that Chevrolet made. The nice thing is that it is a direct bolt in for an AD truck. The only hiccup was the pilot bushing for the 3 speed transmission doesn't fit the hole in the end of the crankshaft. I bought the stock pilot bearing and had the machine shop turn the outside diameter of the pilot bearing to fit. I had it completely rebuilt (all new bearings, camshaft, .040 pistons, timing gears, valves, valve springs, hardened valve seats) and am very happy with the power that it puts out.